3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #ifdef CFG_HUSH_PARSER
37 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
38 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); /* for do_reset() prototype */
41 extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
44 #define MAX_DELAY_STOP_STR 32
46 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen);
47 static int parse_line (char *, char *[]);
48 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
49 static int abortboot(int);
54 char console_buffer[CFG_CBSIZE]; /* console I/O buffer */
56 static char erase_seq[] = "\b \b"; /* erase sequence */
57 static char tab_seq[] = " "; /* used to expand TABs */
59 #ifdef CONFIG_BOOT_RETRY_TIME
60 static uint64_t endtime = 0; /* must be set, default is instant timeout */
61 static int retry_time = -1; /* -1 so can call readline before main_loop */
64 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
66 #ifndef CONFIG_BOOT_RETRY_MIN
67 #define CONFIG_BOOT_RETRY_MIN CONFIG_BOOT_RETRY_TIME
70 #ifdef CONFIG_MODEM_SUPPORT
72 extern void mdm_init(void); /* defined in board.c */
75 /***************************************************************************
76 * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
77 * returns: 0 - no key string, allow autoboot
78 * 1 - got key string, abort
80 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
81 # if defined(CONFIG_AUTOBOOT_KEYED)
82 static __inline__ int abortboot(int bootdelay)
85 uint64_t etime = endtick(bootdelay);
94 { str: getenv ("bootdelaykey"), retry: 1 },
95 { str: getenv ("bootdelaykey2"), retry: 1 },
96 { str: getenv ("bootstopkey"), retry: 0 },
97 { str: getenv ("bootstopkey2"), retry: 0 },
100 char presskey [MAX_DELAY_STOP_STR];
101 u_int presskey_len = 0;
102 u_int presskey_max = 0;
105 #ifdef CONFIG_SILENT_CONSOLE
107 DECLARE_GLOBAL_DATA_PTR;
109 if (gd->flags & GD_FLG_SILENT) {
110 /* Restore serial console */
111 console_assign (stdout, "serial");
112 console_assign (stderr, "serial");
117 # ifdef CONFIG_AUTOBOOT_PROMPT
118 printf (CONFIG_AUTOBOOT_PROMPT, bootdelay);
121 # ifdef CONFIG_AUTOBOOT_DELAY_STR
122 if (delaykey[0].str == NULL)
123 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
125 # ifdef CONFIG_AUTOBOOT_DELAY_STR2
126 if (delaykey[1].str == NULL)
127 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
129 # ifdef CONFIG_AUTOBOOT_STOP_STR
130 if (delaykey[2].str == NULL)
131 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
133 # ifdef CONFIG_AUTOBOOT_STOP_STR2
134 if (delaykey[3].str == NULL)
135 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
138 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
139 delaykey[i].len = delaykey[i].str == NULL ?
140 0 : strlen (delaykey[i].str);
141 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
142 MAX_DELAY_STOP_STR : delaykey[i].len;
144 presskey_max = presskey_max > delaykey[i].len ?
145 presskey_max : delaykey[i].len;
148 printf("%s key:<%s>\n",
149 delaykey[i].retry ? "delay" : "stop",
150 delaykey[i].str ? delaykey[i].str : "NULL");
154 /* In order to keep up with incoming data, check timeout only
157 while (!abort && get_ticks() <= etime) {
158 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i ++) {
159 if (delaykey[i].len > 0 &&
160 presskey_len >= delaykey[i].len &&
161 memcmp (presskey + presskey_len - delaykey[i].len,
163 delaykey[i].len) == 0) {
165 printf("got %skey\n",
166 delaykey[i].retry ? "delay" : "stop");
169 # ifdef CONFIG_BOOT_RETRY_TIME
170 /* don't retry auto boot */
171 if (! delaykey[i].retry)
179 if (presskey_len < presskey_max) {
180 presskey [presskey_len ++] = getc();
183 for (i = 0; i < presskey_max - 1; i ++)
184 presskey [i] = presskey [i + 1];
186 presskey [i] = getc();
192 printf("key timeout\n");
195 #ifdef CONFIG_SILENT_CONSOLE
197 DECLARE_GLOBAL_DATA_PTR;
200 /* permanently enable normal console output */
201 gd->flags &= ~(GD_FLG_SILENT);
202 } else if (gd->flags & GD_FLG_SILENT) {
203 /* Restore silent console */
204 console_assign (stdout, "nulldev");
205 console_assign (stderr, "nulldev");
213 # else /* !defined(CONFIG_AUTOBOOT_KEYED) */
215 #ifdef CONFIG_MENUKEY
216 static int menukey = 0;
219 static __inline__ int abortboot(int bootdelay)
223 #ifdef CONFIG_SILENT_CONSOLE
225 DECLARE_GLOBAL_DATA_PTR;
227 if (gd->flags & GD_FLG_SILENT) {
228 /* Restore serial console */
229 console_assign (stdout, "serial");
230 console_assign (stderr, "serial");
235 #ifdef CONFIG_MENUPROMPT
236 printf(CONFIG_MENUPROMPT, bootdelay);
238 printf("Hit any key to stop autoboot: %2d ", bootdelay);
241 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
243 * Check if key already pressed
244 * Don't check if bootdelay < 0
246 if (bootdelay >= 0) {
247 if (tstc()) { /* we got a key press */
248 (void) getc(); /* consume input */
250 abort = 1; /* don't auto boot */
255 while ((bootdelay > 0) && (!abort)) {
259 /* delay 100 * 10ms */
260 for (i=0; !abort && i<100; ++i) {
261 if (tstc()) { /* we got a key press */
262 abort = 1; /* don't auto boot */
263 bootdelay = 0; /* no more delay */
264 # ifdef CONFIG_MENUKEY
267 (void) getc(); /* consume input */
274 printf ("\b\b\b%2d ", bootdelay);
279 #ifdef CONFIG_SILENT_CONSOLE
281 DECLARE_GLOBAL_DATA_PTR;
284 /* permanently enable normal console output */
285 gd->flags &= ~(GD_FLG_SILENT);
286 } else if (gd->flags & GD_FLG_SILENT) {
287 /* Restore silent console */
288 console_assign (stdout, "nulldev");
289 console_assign (stderr, "nulldev");
296 # endif /* CONFIG_AUTOBOOT_KEYED */
297 #endif /* CONFIG_BOOTDELAY >= 0 */
299 /****************************************************************************/
301 void main_loop (void)
303 #ifndef CFG_HUSH_PARSER
304 static char lastcommand[CFG_CBSIZE] = { 0, };
310 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
314 #ifdef CONFIG_PREBOOT
317 #ifdef CONFIG_BOOTCOUNT_LIMIT
318 unsigned long bootcount = 0;
319 unsigned long bootlimit = 0;
322 #endif /* CONFIG_BOOTCOUNT_LIMIT */
324 #if defined(CONFIG_VFD) && defined(VFD_TEST_LOGO)
325 ulong bmp = 0; /* default bitmap */
326 extern int trab_vfd (ulong bitmap);
328 #ifdef CONFIG_MODEM_SUPPORT
330 bmp = 1; /* alternate bitmap */
333 #endif /* CONFIG_VFD && VFD_TEST_LOGO */
335 #ifdef CONFIG_BOOTCOUNT_LIMIT
336 bootcount = bootcount_load();
338 bootcount_store (bootcount);
339 sprintf (bcs_set, "%lu", bootcount);
340 setenv ("bootcount", bcs_set);
341 bcs = getenv ("bootlimit");
342 bootlimit = bcs ? simple_strtoul (bcs, NULL, 10) : 0;
343 #endif /* CONFIG_BOOTCOUNT_LIMIT */
345 #ifdef CONFIG_MODEM_SUPPORT
346 debug ("DEBUG: main_loop: do_mdm_init=%d\n", do_mdm_init);
348 uchar *str = strdup(getenv("mdm_cmd"));
349 setenv ("preboot", str); /* set or delete definition */
352 mdm_init(); /* wait for modem connection */
354 #endif /* CONFIG_MODEM_SUPPORT */
356 #ifdef CONFIG_VERSION_VARIABLE
358 extern char version_string[];
360 setenv ("ver", version_string); /* set version variable */
362 #endif /* CONFIG_VERSION_VARIABLE */
364 #ifdef CFG_HUSH_PARSER
365 u_boot_hush_start ();
368 #ifdef CONFIG_PREBOOT
369 if ((p = getenv ("preboot")) != NULL) {
370 # ifdef CONFIG_AUTOBOOT_KEYED
371 int prev = disable_ctrlc(1); /* disable Control C checking */
374 # ifndef CFG_HUSH_PARSER
377 parse_string_outer(p, FLAG_PARSE_SEMICOLON |
378 FLAG_EXIT_FROM_LOOP);
381 # ifdef CONFIG_AUTOBOOT_KEYED
382 disable_ctrlc(prev); /* restore Control C checking */
385 #endif /* CONFIG_PREBOOT */
387 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
388 s = getenv ("bootdelay");
389 bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
391 debug ("### main_loop entered: bootdelay=%d\n\n", bootdelay);
393 # ifdef CONFIG_BOOT_RETRY_TIME
395 # endif /* CONFIG_BOOT_RETRY_TIME */
397 #ifdef CONFIG_BOOTCOUNT_LIMIT
398 if (bootlimit && (bootcount > bootlimit)) {
399 printf ("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
400 (unsigned)bootlimit);
401 s = getenv ("altbootcmd");
404 #endif /* CONFIG_BOOTCOUNT_LIMIT */
405 s = getenv ("bootcmd");
407 debug ("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
409 if (bootdelay >= 0 && s && !abortboot (bootdelay)) {
410 # ifdef CONFIG_AUTOBOOT_KEYED
411 int prev = disable_ctrlc(1); /* disable Control C checking */
414 # ifndef CFG_HUSH_PARSER
417 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
418 FLAG_EXIT_FROM_LOOP);
421 # ifdef CONFIG_AUTOBOOT_KEYED
422 disable_ctrlc(prev); /* restore Control C checking */
426 # ifdef CONFIG_MENUKEY
427 if (menukey == CONFIG_MENUKEY) {
428 s = getenv("menucmd");
430 # ifndef CFG_HUSH_PARSER
431 run_command (s, bd, 0);
433 parse_string_outer(s, FLAG_PARSE_SEMICOLON |
434 FLAG_EXIT_FROM_LOOP);
438 #endif /* CONFIG_MENUKEY */
439 #endif /* CONFIG_BOOTDELAY */
441 #ifdef CONFIG_AMIGAONEG3SE
443 extern void video_banner(void);
449 * Main Loop for Monitor Command Processing
451 #ifdef CFG_HUSH_PARSER
453 /* This point is never reached */
457 #ifdef CONFIG_BOOT_RETRY_TIME
459 /* Saw enough of a valid command to
460 * restart the timeout.
465 len = readline (CFG_PROMPT);
467 flag = 0; /* assume no special flags for now */
469 strcpy (lastcommand, console_buffer);
471 flag |= CMD_FLAG_REPEAT;
472 #ifdef CONFIG_BOOT_RETRY_TIME
473 else if (len == -2) {
474 /* -2 means timed out, retry autoboot
476 printf("\nTimed out waiting for command\n");
477 # ifdef CONFIG_RESET_TO_RETRY
478 /* Reinit board to run initialization code again */
479 do_reset (NULL, 0, 0, NULL);
481 return; /* retry autoboot */
487 printf ("<INTERRUPT>\n");
489 rc = run_command (lastcommand, flag);
492 /* invalid command or not repeatable, forget it */
496 #endif /*CFG_HUSH_PARSER*/
499 #ifdef CONFIG_BOOT_RETRY_TIME
500 /***************************************************************************
501 * initialise command line timeout
503 void init_cmd_timeout(void)
505 char *s = getenv ("bootretry");
508 retry_time = (int)simple_strtoul(s, NULL, 10);
510 retry_time = CONFIG_BOOT_RETRY_TIME;
512 if (retry_time >= 0 && retry_time < CONFIG_BOOT_RETRY_MIN)
513 retry_time = CONFIG_BOOT_RETRY_MIN;
516 /***************************************************************************
517 * reset command line timeout to retry_time seconds
519 void reset_cmd_timeout(void)
521 endtime = endtick(retry_time);
525 /****************************************************************************/
528 * Prompt for input and read a line.
529 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
530 * time out when time goes past endtime (timebase time in ticks).
531 * Return: number of read characters
535 int readline (const char *const prompt)
537 char *p = console_buffer;
538 int n = 0; /* buffer index */
539 int plen = 0; /* prompt length */
540 int col; /* output column cnt */
545 plen = strlen (prompt);
551 #ifdef CONFIG_BOOT_RETRY_TIME
552 while (!tstc()) { /* while no incoming data */
553 if (retry_time >= 0 && get_ticks() > endtime)
554 return (-2); /* timed out */
557 WATCHDOG_RESET(); /* Trigger watchdog, if needed */
559 #ifdef CONFIG_SHOW_ACTIVITY
561 extern void show_activity(int arg);
568 * Special character handling
571 case '\r': /* Enter */
575 return (p - console_buffer);
577 case 0x03: /* ^C - break */
578 console_buffer[0] = '\0'; /* discard input */
581 case 0x15: /* ^U - erase line */
590 case 0x17: /* ^W - erase word */
591 p=delete_char(console_buffer, p, &col, &n, plen);
592 while ((n > 0) && (*p != ' ')) {
593 p=delete_char(console_buffer, p, &col, &n, plen);
597 case 0x08: /* ^H - backspace */
598 case 0x7F: /* DEL - backspace */
599 p=delete_char(console_buffer, p, &col, &n, plen);
604 * Must be a normal character then
606 if (n < CFG_CBSIZE-2) {
607 if (c == '\t') { /* expand TABs */
608 puts (tab_seq+(col&07));
611 ++col; /* echo input */
616 } else { /* Buffer full */
623 /****************************************************************************/
625 static char * delete_char (char *buffer, char *p, int *colp, int *np, int plen)
633 if (*(--p) == '\t') { /* will retype the whole line */
634 while (*colp > plen) {
638 for (s=buffer; s<p; ++s) {
640 puts (tab_seq+((*colp) & 07));
641 *colp += 8 - ((*colp) & 07);
655 /****************************************************************************/
657 int parse_line (char *line, char *argv[])
662 printf ("parse_line: \"%s\"\n", line);
664 while (nargs < CFG_MAXARGS) {
666 /* skip any white space */
667 while ((*line == ' ') || (*line == '\t')) {
671 if (*line == '\0') { /* end of line, no more args */
674 printf ("parse_line: nargs=%d\n", nargs);
679 argv[nargs++] = line; /* begin of argument string */
681 /* find end of string */
682 while (*line && (*line != ' ') && (*line != '\t')) {
686 if (*line == '\0') { /* end of line, no more args */
689 printf ("parse_line: nargs=%d\n", nargs);
694 *line++ = '\0'; /* terminate current arg */
697 printf ("** Too many args (max. %d) **\n", CFG_MAXARGS);
700 printf ("parse_line: nargs=%d\n", nargs);
705 /****************************************************************************/
707 static void process_macros (const char *input, char *output)
710 const char *varname_start = NULL;
711 int inputcnt = strlen (input);
712 int outputcnt = CFG_CBSIZE;
713 int state = 0; /* 0 = waiting for '$' */
714 /* 1 = waiting for '(' */
715 /* 2 = waiting for ')' */
716 /* 3 = waiting for ''' */
718 char *output_start = output;
720 printf ("[PROCESS_MACROS] INPUT len %d: \"%s\"\n", strlen(input), input);
723 prev = '\0'; /* previous character */
725 while (inputcnt && outputcnt) {
730 /* remove one level of escape characters */
731 if ((c == '\\') && (prev != '\\')) {
740 case 0: /* Waiting for (unescaped) $ */
741 if ((c == '\'') && (prev != '\\')) {
745 if ((c == '$') && (prev != '\\')) {
752 case 1: /* Waiting for ( */
755 varname_start = input;
767 case 2: /* Waiting for ) */
770 char envname[CFG_CBSIZE], *envval;
771 int envcnt = input-varname_start-1; /* Varname # of chars */
773 /* Get the varname */
774 for (i = 0; i < envcnt; i++) {
775 envname[i] = varname_start[i];
780 envval = getenv (envname);
782 /* Copy into the line if it exists */
784 while ((*envval) && outputcnt) {
785 *(output++) = *(envval++);
788 /* Look for another '$' */
792 case 3: /* Waiting for ' */
793 if ((c == '\'') && (prev != '\\')) {
808 printf ("[PROCESS_MACROS] OUTPUT len %d: \"%s\"\n",
809 strlen(output_start), output_start);
813 /****************************************************************************
815 * 1 - command executed, repeatable
816 * 0 - command executed but not repeatable, interrupted commands are
817 * always considered not repeatable
818 * -1 - not executed (unrecognized, bootd recursion or too many args)
819 * (If cmd is NULL or "" or longer than CFG_CBSIZE-1 it is
820 * considered unrecognized)
824 * We must create a temporary copy of the command since the command we get
825 * may be the result from getenv(), which returns a pointer directly to
826 * the environment data, which may change magicly when the command we run
827 * creates or modifies environment variables (like "bootp" does).
830 int run_command (const char *cmd, int flag)
833 char cmdbuf[CFG_CBSIZE]; /* working copy of cmd */
834 char *token; /* start of token in cmdbuf */
835 char *sep; /* end of token (separator) in cmdbuf */
836 char finaltoken[CFG_CBSIZE];
838 char *argv[CFG_MAXARGS + 1]; /* NULL terminated */
844 printf ("[RUN_COMMAND] cmd[%p]=\"", cmd);
845 puts (cmd ? cmd : "NULL"); /* use puts - string may be loooong */
849 clear_ctrlc(); /* forget any previous Control C */
852 return -1; /* empty command */
855 if (strlen(cmd) >= CFG_CBSIZE) {
856 puts ("## Command too long!\n");
860 strcpy (cmdbuf, cmd);
862 /* Process separators and check for invalid
863 * repeatable commands
867 printf ("[PROCESS_SEPARATORS] %s\n", cmd);
872 * Find separator, or string end
873 * Allow simple escape of ';' by writing "\;"
875 for (inquotes = 0, sep = str; *sep; sep++) {
881 (*sep == ';') && /* separator */
882 ( sep != str) && /* past string start */
883 (*(sep-1) != '\\')) /* and NOT escaped */
888 * Limit the token to data between separators
892 str = sep + 1; /* start of command for next pass */
896 str = sep; /* no more commands for next pass */
898 printf ("token: \"%s\"\n", token);
901 /* find macros in this token and replace them */
902 process_macros (token, finaltoken);
904 /* Extract arguments */
905 argc = parse_line (finaltoken, argv);
907 /* Look up command in command table */
908 if ((cmdtp = find_cmd(argv[0])) == NULL) {
909 printf ("Unknown command '%s' - try 'help'\n", argv[0]);
910 rc = -1; /* give up after bad command */
914 /* found - check max args */
915 if (argc > cmdtp->maxargs) {
916 printf ("Usage:\n%s\n", cmdtp->usage);
921 #if (CONFIG_COMMANDS & CFG_CMD_BOOTD)
922 /* avoid "bootd" recursion */
923 if (cmdtp->cmd == do_bootd) {
925 printf ("[%s]\n", finaltoken);
927 if (flag & CMD_FLAG_BOOTD) {
928 printf ("'bootd' recursion detected\n");
933 flag |= CMD_FLAG_BOOTD;
935 #endif /* CFG_CMD_BOOTD */
937 /* OK - call function to do the command */
938 if ((cmdtp->cmd) (cmdtp, flag, argc, argv) != 0) {
942 repeatable &= cmdtp->repeatable;
944 /* Did the user stop this? */
946 return 0; /* if stopped then not repeatable */
949 return rc ? rc : repeatable;
952 /****************************************************************************/
954 #if (CONFIG_COMMANDS & CFG_CMD_RUN)
955 int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
960 printf ("Usage:\n%s\n", cmdtp->usage);
964 for (i=1; i<argc; ++i) {
967 if ((arg = getenv (argv[i])) == NULL) {
968 printf ("## Error: \"%s\" not defined\n", argv[i]);
971 #ifndef CFG_HUSH_PARSER
972 if (run_command (arg, flag) == -1)
975 if (parse_string_outer(arg,
976 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
982 #endif /* CFG_CMD_RUN */